Method of making sheet-metal radiators.



METHOD 0E WITNESS-ES PATENTED PEB. 26, 1907.

W. R. KINNEAR.

MAKING SHEET METAL RADIATORS. APPLICATION FILED rBB.15,19o5.

2 SHEETS-SHEET 2.

WILLIAM R. KINNEAR, or NEW YORK, N. Y;

' METHOD oF MAKING SHEET-METAL RADIATORS.'

Specification of Letters Patent.

Application filed February 15, 1905:. Serial No. 245,744.

Patented Feb. 26, 1907.

T rl/Z] whom t may coli/cern,.-

Be it known that'I7 WILLIAM R. KINNEAR, of Newv York city, in the county of New York and State of New York, haveinvented a new and useful Method of Making Metal Radiatoraof which thefollowing is a full, clear, and exact description, reference' being had to the -accompanying drawings,` forming part of this specification, in which-v Figure 1 is a view showing-the dipping of the radiator in the bath of coating-metal.

Fig. 2 is a detail view showing two assembled diator-sections.

tageous, in that the metal coating is cracked sections of a radiator. showing the vent-holes and the coating inlet-holes and Fig. 3 is a sectional plan view of Fig. 2.

My invention relates to the manufacture of sheet-metal radiators as distinguished from those of cast metal, 'and is designed to provide a new and improved method of coating such radiators with a protective metallic covering, such as zinc or brass, and, further, to effectually seal the joints and provide an attractive and long-lived article.

Heretofore in the vmanufacture of sheet- Inetal radiators it has been proposed to coat the sheets with the protective metal or zinc and then form the sheet or sheets into the ra- This method is disadvanand flaked oif during the shaping and assembling. Such method also necessitates the separate brazing or soldering of the joints in each section.

My invention overcomes these diiiculties; andiit consists in the novel method hereinafter described and claimed.

In carrying out my process I form a series of radiator-sections out of sheet metal, each section beingv seamed in any desirable manner. sheets, it will beprovided with longitudinal seams and end seams, or if made of seamless tubing it may be provided with end 'seams only. The section may also be formed by drawing up sheet metal into cup form for the top andbottom ofthe section and then securing V`an intermediate section or sections by transverse seams.

The sections will preferably have incoming holes at ornear the bottoms to provide for the circulation of the heating iiuid, such as steam or water, and the. form and construction of the section can be widely varied so far as the present invention is concerned.-

After the section has been formed and seamed it is' preferably provided With a small If. the section is made up of a sheet orvent-hole at one end in order to allow the escape of the air during the dipping, and thus provide for iiowing of the iiuX and coatingmetal throughout its surfaces, both internal and external. I have shown these vent-holes at 3 on each section 2. The section is then lowered into the floating iiux 4 on the top of the coating-b ath at oneI side of the partition 5 and is moved so as to cause the iiuX to flow throughout the surfaces of the section. A fter the surfaces are thus treated with iuX the sec- '.tion is lowered into the bath of coating-metal and is preferably tilted and moved about therein so as to cause the metal to pour or flow throughout the section, and thus provide a coating of the zinc, brass, or other coatingmetal throughout the internal and external surfaces, and throughout the seams and whatever holes there are in the' section. In the form shown the sections are dro ped and then picked up on the other side ol) the partition. The cut edges of thesheets or other metal of the section are thus covered with the coating-metal, and there is no liability to cracking or flaking oif of the section after it is taken out, since there is no bending, seaining, or other work done on the section which would have this effect. The sections may then be assembled and secured inany desirable manner.

Instead of dipping the sections one by one I vprefer to form them `to iinal shape, nest them together, and secure them to form the .complete radiator except for-the feet, which are preferably secured after the coacting of the radiator-body. This radiator-body is then dipped in the flux, the sections being provided with the vent holes. It is then lowered into the coating-bath and moved about to cause the metal to thoroughly coat.v all portions. In this case the coating-metal serves to seal or solder the joints between the successive sections. The radiator-body may then be taken out to cool, when the vent-holes are closed 11p, preferably by inserting rivets, which are lheaded and. soldered or brazed. The feet may then be applied, when the radiator is complete.

In Fig. 2 I 4show one form of radiator-section,l which is built up from one sheet having longitudinal seam 6, with top and bottom caps 7 and 8 secured by suitable seams. In this form the sides are pinched together at separated points, where eyelets 9 are secured for through-rod holding the sections to gether. This also aids in sustaining the IOO IIO.

bursting-pressure. In this form the sections are provided at the top and bottom with lateral bosses 1,0, the boss of one section being seamed to the boss of the next section in assembling the sections before galvanizing. These bosses may of course be connected by intermediate collars, if desired.

In order to drain the coating-metal from the section, I preferably form drainage-holes 11 atthe bottom of the sections, since the holes for passage of heating fluid are usually above the bottom. I amthus enabled' to drain out all the surplus coating-metal from the sections. This. drainage-hole will usually be placed at the lowest point of each section.

In case thesection is provided with holes for the passage of the heatingfluid at both the top and bottom, as in radiators for hot water, the vent-holes at the top may consist. of these holes for the passage of fluid. I also plrefer to sprinkle or drift salamoniac or some ux upon the section or radiator-body as it is drawn out of the bath to cause the surplus metal to flow back into the bath.

The advantagesA of my invention will be apparent to thoseskilled in the art. The rocess does away with all liability of bend- Ving'or cracking the coatingby working the metal after galvanizing. It etectually coats the seams and cut edges, andin case' the radiator-body is dipped as a whole it seals and solders the joints between the sections. The danger of oxidation or rusting of the parts'is overcome, and an attractive article is obtained.

Many changes may be made in the form of the radiator-section, the feet, the method of securing the sections together, &c., without de arting from my invention.

claim- 1. The method of making sheet-metal radiators which consists in providing a plurality v of hollow units or sections, connected near -one end by means which establish free circulation among them, and provided with individual vents near their ends opposite the circulation connect-ion, and dipping them in position to admit flux and coating metal through the circulation-opening and cause it to ilow through the units or sections; substantially as described.

2. The method of making sheet-metal radiators which consists in providing a plurality of hollow units or sections, connected near one end by means which establish free circulation among them, and provided with individual vents near their ends opposite the circulation connection and with individual drainagempenings below the circulation connection, dipping them in position to admit flux and coating metal through the circulation-opening and cause it to [low through the units or sections, withdrawing the radiator -in position to drain the surplus Inet-al through the drainage-openings, and iinally closing the vents and drainage-openings; substantially as described.

In testimony whereof -I have hereunto set my hand.

WILLIAM R. KINNEAR. Witnesses:

E. C. SMITH,

WM. P. HAMMOND. 

